Skip to main content

SIMPLEX TRADING, LLC

Location
CHICAGO, IL
Portfolio Value
Mid $2,805,652,692
Diversification
Diversified
Filing Date
Global Rank
#974 / 8,603 ▼ 84 · as of Mar 2026
Top Industry
Semiconductors 20.8%
3Y Alpha vs SPY
-3.0%
Period ended 3 months ago
Filed May 14, 2026 · 56d
25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio
+58.6%
SPY
+76.0%
Annualised alpha
-4.1%
Max drawdown
−23.9%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

1,980 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025
Top Position
9.4%
+3.4 pts
Top 5
28.7%
+10.6 pts
Top 10
42.6%
+16.2 pts
HHI
245
Jun 2023 → Mar 2026 · range 77 – 469
Diversified+127

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026
Sector % Portfolio Value
Technology 33.1% $929,327,291
Unclassified 11.6% $326,020,302
Consumer Cyclical 10.8% $303,868,418
Healthcare 10.7% $301,473,333
Communication Services 10.4% $291,009,660
Industrials 5.3% $148,771,386
Financial Services 4.5% $126,152,456
Basic Materials 4.5% $126,072,992
Energy 4.4% $124,086,364
Consumer Defensive 2.3% $65,424,493
Real Estate 1.5% $42,419,115
Utilities 0.7% $21,026,882

Last Quarter's Activity

Export CSV
Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
1,980 positions · $2,805,652,692 total · as of Mar 31, 2026
Showing 1–50 of 1,980 positions by value · page 1 of 40
Ticker Company Shares Value (USD) % of Portfolio History